Former Democratic aide pleads guilty to doxing GOP senators attending Kavanaugh hearing

A former congressional Democratic staff member pleaded guilty on Friday to posting private information about Republican senators who took part in the hearings on sexual assault allegations against then-Supreme Court nominee Brett KavanaughBrett Michael KavanaughFive landmark moments of testimony to Congress Lindsey Graham basks in the impeachment spotlight Trump rips ABC over Epstein coverage MORE.

Jackson Cosko, 27, pleaded guilty to two counts of making public restricted personal information and one count each of computer fraud, witness tampering and obstruction of justice, The Washington Post reported.

The five federal felony counts carry maximum penalties up to 20 years in prison. In accordance with a plea agreement, prosecutors said a sentencing range of 46 to 57 months applied under federal guidelines.

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Cosko, who has served about four months in jail since he was charged, will be sentenced on June 13, the newspaper noted.

The agreement comes after Cosko was accused of releasing the private information of five Republican senators last year.

Cosko was reportedly upset after he had been fired from the office of Sen. Maggie HassanMargaret (Maggie) HassanHillicon Valley: Facebook launches 'News Tab' | Senate passes bill to take on 'deepfakes' | Schumer outlines vision for electric cars Senate passes legislation to combat 'deepfake' videos Hillicon Valley: Senators seek national security review of TikTok | TikTok denies claims of Chinese government influence | CNN chief rips Facebook policy on political ads | Dem questions DHS' handling of personal data MORE (D-N.H.) in May. He said in court filings that he had "engaged in an extraordinarily extensive data theft scheme" by burglarizing the office several times after his ouster to steal sensitive information he could use later.

According to the Post, Cosko said he "became angry" on Sept. 27 as he watched Kavanaugh, President TrumpDonald John TrumpFive landmark moments of testimony to Congress Lindsey Graham basks in the impeachment spotlight Democrats sharpen their message on impeachment MORE’s then-Supreme Court nominee, testify before the Senate Judiciary Committee. Kavanaugh's hearing came after he was accused of sexual assault by Christine Blasey Ford.

Ford testified before the Senate panel in late September that she had been assaulted by Kavanaugh when they were in high school in the 1980s. He vehemently denied Ford's and two other women's allegations in his own subsequent hearing.

Cosko admitted to the court that he responded to the contentious hearings by anonymously editing the Wikipedia pages of five Republican senators to add their phone numbers and home addresses, according to the Post.

The information was quickly removed when it was discovered, and aides contacted authorities.

Cosko said the group included GOP Senate Judiciary Committee members Lindsey GrahamLindsey Olin GrahamLindsey Graham basks in the impeachment spotlight Trump circuit court nominee in jeopardy amid GOP opposition The Hill's Morning Report - Impeachment drama will dominate this week MORE (S.C.), Mike LeeMichael (Mike) Shumway LeeOn The Money: Retirement savings bill blocked in Senate after fight over amendments | Stopgap bill may set up December spending fight | Hardwood industry pleads for relief from Trump trade war Retirement bill blocked in Senate amid fight over amendments Senators press NSA official over shuttered phone surveillance program MORE (Utah) and Orrin HatchOrrin Grant HatchTrump awards Medal of Freedom to racing industry icon Roger Penske Trump holds more Medal of Freedom ceremonies than predecessors but awards fewer medals Trump to award Medal of Freedom to former Attorney General Edwin Meese MORE (Utah) as well as Sen. Rand PaulRandal (Rand) Howard PaulSunday shows — New impeachment phase dominates Rand Paul says Trump has 'every right' to withhold Ukraine aid over corruption Paul dismisses Bevin loss, touts 'red wave' in other Kentucky races MORE (R-Ky.) and Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellLindsey Graham basks in the impeachment spotlight Biden not ruling out Senate voting to impeach Trump: 'It will depend on what their constituency says' Congress hunts for path out of spending stalemate MORE (R-Ky.).

Cosko was caught sneaking into Hassan’s office after 10 p.m.  to log on to an aide’s computer. He was recognized by another staffer and ordered to leave, according to court papers.

The other aide then received a threatening email minutes later with the subject line "I own Everything." The message reportedly stated, "If you tell anyone I will leak it all. Emails signal conversations gmails. Senators children’s health information and socials," according to plea papers reviewed by the Post.

Cosko was arrested on Oct. 3.